API design associate exam

Hello All, Can someone point some online material to study for API design associate exam? And I understand that there is no self study course for this exam like we had for integrartion and API associate.

I was in U.S. that time when I ordered. Got an email for completion of certification and a week later got email with voucher code for T-Shirt. If you haven't received your T-Shirt yet, I suggest, please reach out to Champions Admins, they are very helpful and will definitely provide some solution.

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